应6163银河线路检测中心国际合作处及理学院数学系杨畅博士的邀请，法国图卢兹第三大学Francis Filbet教授将于8月14日至20日访问公司并讲学，欢迎老师和同学与其讨论交流。

报告题目：Asymptotically preserving Particle-In-Cell methods for inhomogeneous strongly magnetized plasmas

地点：格物楼201

时间：2017年8月17日 下午15:00-16:00

报告摘要：We propose a class of Particle-In-Cell (PIC) methods for the Vlasov-Poisson system with a strong and inhomogeneous external magnetic field with fixed direction, where we focus on the motion of particles in the plane orthogonal to the magnetic field (so-called poloidal directions). In this regime, the time step can be subject to stability constraints related to the smallness of Larmor radius and plasma frequency. To avoid this limitation, our approach is based on first and higher-order semi-implicit numerical schemes already validated on dissipative systems and for homogeneous magnetic fields. Thus, when the magnitude of the external magnetic field becomes large, this method provides a consistent PIC discretization of the guiding-center system taking into account variations of the magnetic field. We carry out some theoretical proofs and perform several numerical experiments that establish a solid validation of the method and its underlying concepts.

Francis Filbet教授简介：Francis Filbet教授是图卢兹三大的全职教授，在数学高水平国际期刊上发表多篇论文。Filbet教授的主要研究方向包括等离子体物理数学建模，生物数学及其数值算法等，这些研究成果非常有影响力。随着核聚变研究的深入，Filbet教授的研究方向也是计算数学领域的研究热门。

Filbet教授的主要获奖情况：

1.IBM visiting Professor at Brown University (spring 2016)
2.Nelder visiting fellow at Imperial College of London (January 2016)
3.Junior member of Institut Universitaire de France (2015-2020)
4.Von Neumann visiting Professor at Technische Universität München (fall 2015)
5.Principal Investigator of a European Research Council Starting Grant - project NuSiKiMo 2010-2014
6.Prix Blaise Pascal from Académie des Sciences (2012).